Valve timing device



0a. 29, 1935. F, HAU ER 2,019,903

VALVE TIMING DEVICE Fi led Oct. 25,1933 5 Sheets-Sheet 1 Oct. 29, 1935. F. HAUSER 2,019,003

VALVE TIMING DEVICE FiledfOct. 25, 1935 5 Sheets-Sheet 2 as as :3 i A. a 6 5! 37 a Oct. 29, 1935. F. HAUSER I VALVE TIMING DEVICE Filed Oct 25, 1935 S-Sheets-Sheet s Oct. 29, 1935. F. HAUSER VALVE TIMING DEVICE 5 Sliei-Shget 4 Oct. 29, 1935. F. HAUSER VALVE TIMING DEVICE Fild Oct. 25, 1935 5 Sheets-Sheet 5 Patented Oct. 29, 1935 PATENT OFFICE vsnva 'mmvo navrcs Fred mam, Pasadena, can.

Application October-25, ms. Serial No. 005,105

13 Claims.

This invention relates to control devicesand more particularly to a timing device for a gas stove by means of which the housewife may predetermine a time period during which cooking 5 shall take place, at'the end of which time period,

the gas supply will automatically be cut ofl.

It is an object of this invention to provide such a device which will be simple to operate and completely foolproof.

It is a further object to provide a device of this kind whereby the housewife may by a single operation set the device, which will then perform its function without further attention.

It is another object to provide such a device 15 in which the time period set may be lengthened or shortened at any time after setting.

It is a further object to provide a device of th kind in which the danger usualy attendant on such devices is eliminated by appropriate inter- 20 locking devices.

' A still 'further and important object of this invention is to provide a device of this type which is'sturdy and certain in operation, and which may be easily adapted to all of the various condi- 25 tions encountered in stove installations, and

which does not require external power connections.

With these and other objects in view, which will be apparent from the reading of the specifi- 3 cations and drawings, the invention comprises the combination of the various parts, members and features, two embodiments of which are shown in the drawings and described in the specification, and will be finally pointed out in 35 the claims.

Fig. 1 shows a gas stove embodying my invention; Fig. 2 is a rear view of the gas stove of Fig. 1 showing the manner of application and connection of my invention to said stove; Fig. 3 is a 40 -face view of the control device of 'my invention, Fig. 4 is a sectional view taken on line 4-4 of Fig. 3; Fig. 5 is a sectional view taken on line B! of Fig. 4 portions of the device beyond the plane of the section being omittedfor clearness 45 of illustration; Figures 6. '1, and 8, are fragmentary details of a portion of the showing of Fig. 5'

in different positions thereof; Fig. 9 is a sectional view taken on line 8-9 of Fig. 4; Fig. 10 is a sectional view taken on line i0l0 of Fig. 4; 50 Figures 11 and 12 are enlarged fragmentary details of portions of the showing of Fig. 10 in other positions thereof; Fig. 13 is a sectional view taken on line l3i3 of Fig. 8; Fig. 14 is a sectional viewtaken on line l4l4 of Fig. 9; Fig. 15

55 is a conventionalized section taken on line ll-i! -to the movement of the pointer.

of Figs. 18, 2 and 5; Fig. 16 illustrates a portion of the showing of Fig. 15 in another position thereof; Fig. 17 is a fragmentary showing of a portion of Fig. 16 in still another position thereof; Fig. 18 is a sectional view taken on line iB-IB 5 of Fig. 15; Fig. 19 is a sectional view of a modified form of my invention; Fig. 20 is a sectional view taken on line '2020 of Fig.19; Fig. 21 is a fragmentary view of a portion of Fig; 19 in another position thereof Fig. 22 is adetail of a portion 10 of the showing of Fig. 5 in another position there- Fig. 23 is a sectional detail taken on line 23-23 of Fig. 9;.Fig. 24 is a section similar to Fig.

23 showing another position of the parts thereof; Fig. 25 is a fragmentary detail ofa portion of the 15 showing of Fig. 5 taken on line 28-" thereof.

' .The stove A consists of the usual frame and covering 0 having burners b controlled by the handle c. Gas is supplied to the burners through the pipe 30, and through the valve ii to the burner 20 supply pipe 32. The control device 33, forming a part of my invention, is aillxed to any convenient portion of the stove, and consists of a housing 34. within which is mounted a dial 85, upon which indicia a indicate hours and minutes, and over 25 which plays the pointer 86. The setting knob 81 is adapted to set the pointer 80' through the jaw clutch 38 and gear 30. Jaw clutch 3! comprises a sleeve 40 slidable upon the control shaft 4! and retained thereon by the dogscrew 42 operating in 30 the shaft recess 43. Sleeve 40 is mounted in and forms the hub of the setting knob I1, the inner end being toothed to mesh with cooperating teeth upon the hub of gear 38. Gear 39 meshes with an intermediate gear 44 which in turn meshes with 35 and drives the pointer gear 45 attached to the pointer 36 and Journalled upon the shaft 48. Compression spring 41 between the knob 81 and housing 34, presses knob 81 continually outward, holding the'teeth of sleeve 40 out of engagement 40 with the teeth of the hub of gear 39. so that the clutch 38 is normally disengaged. Upon inward pressing of the knob 31, the clutch teeth engage, and rotation of the knob sets the pointer 30 through gears 30, 44, and 45. 4 Gear 39 is rigidly attached to the control shaft 4i. and said shaft is therefore rotated when the pointer is set by an amount exactly in proportion A sleeve 4! is likewise attached to the shaft 4|, as by pin 49, to which is also attached one end of a main spring Ill. The other and BI thereof its attached to one of the spacers II connecting the side plates 53 in which shaft 4 I is journalled. The spring 50 is so mounted that it will be wound by rotation of the 66 a star spring 66. A gear 66 is carried on the .sleeve 46 between a pair of friction plates 61,

which in turn are carried between the star spring 65 and the flange 64, the star spring holding gear and plates in frictional contact with each other.

Gear 56 is connected to escapement gearing 66 by a train of clock gears 66, 66, 6|, 62, and 66, the latter of which is on the escapement ratchet shaft 64, carrying the ratchet 66, controlled and timed by the balance wheel 66, hair spring 61, and lever escapement 66, in the usual manner of clock gearing.

' A starting mechanism is incorporated in the control device and is best illustrated in Figures 9 to 14 inclusive. A pin 66 projects through the housing 64 under the rim of the setting knob 61, in such relation as to be depressed thereby upon the inward movement of the knob 61 nry in setting operations to, engage the jaw clutch 66. The pin 66 is attached to a leaf spring 16, carried by one of the side plates 66. The free end of this spring 56 overlies a second leaf spring II, also attached to one of the plates 66, and extending downward through an opening therein to form a starting arm 12. This arm is adapted to engage the pallet lever 16 of the escapement 66, in such a manner as to rotate the balance wheel 66 against the resistance of the hair spring 61 when the pin 66 is depressed by knob 61. (See Fig. 12.) Riveted to the under side of the leaf spring I6 is a catch spring 16a which extends downwardly therefrom through an opening 664 in the side I plate 53 in the form of a loop 16b. The opposite Ha when pressure on knob 61 is fully relieved- Thereupon, the energy stored in spring II and thus in hairspring 61, held thereby, is suddenly released, and the clockwork is started with suflicient energy to insure positive starting thereof. Otherwise, a slow release of pressure on knob 61 might not suppLv suflicient energy to complete the required amount of swing of the lever of escapement 66 'to eifect the necessary release thereof. Upon the release of the pressure upon setting knob 61, the arm 12 retracts tothe original position (see Fig. 11) and the energy of the hair spring starts the escapement mechanism 66,

powerbeing furnishedbythemainspring'flto continue the operation back through the gearing 66, 62, 6|, 66, 66, and 66, and through the friction plates 51 to the sleeve 46 and shaft 4|, and then through gears 66, 44, and 46 to move the pointer 3 66 back to "'0 position on the dial 6'. During the manual setting of the pointer 66,-

knob 61 is depressed until the clutch 66 engages and rotated by the operator until the pointer reaches the desided position. During this operation the friction plates 61 slip, thus permitting such setting without the gearing to the escapement mechanism 66. They also permit movement of the pointer and connected gearing in either direction, so that the time period desired may be accurately and easily set.

the resistance of valve spring 6|.

To the innermost end of the shaft 4| is attached a cam lever 14, adapted to operate the trip mechanism to control the fuel supply as will now be described. A plunger 16 is slidably mounted in the bore 16 of the housing 64. At the lower end of the housing is a bushing I1, serving as a guide for a push wire 16, which transmits movement ofv the plunger to valve 6|. Downward movement of the plunger 16 through this push wire depresses the valve disc 16 of the 16 valve 6|, forcing it away from its seat 66 against I Valve 6| is opened thereby to permit gas to pass through from pipe 66 to supply pipe 62 and to the burners b. Push wire I6 is inclosed in a wire spring ll conduit 62 to guide itclosely and permit the transmittal of the necessary force through the 'flexible wire, regardless of the relative'locatio of the valve 6| and control device 66. s

The plunger 16 is made with a circumferential U recess 66, forming an upward directed shoulder 64 for coaction with a trip lever 66, pivoted at 66 to a bracket 61 attached to the housing 64. Pivot 66 is as close to the center line of the contact of the trip lever 66- with the shoulder 6666 as is practical in order to minimize forces in the set" position. Trip lever 66 is of hell crank form, having one end 66 extending downward for cooperation with the shoulder 64 and the other end 66 extending horizontally outward 66 from the pivot 66 to a considerable length to provide a weighted leverage holding the end 66 against the plunger. The end' 66 overlies the cam lever I4 on shaft 4| and is fitted with a pivot 66 above. the center line of said shaft for the 66 reception of a click 6|, adapted to cooperate with the cam lever I4.

Cam lever I4 is formed with a. bevelled face 62 at its outward end, and a substantially radial face 66. Click 6| is formed with a tooth 64 exa tending downwardly from pivot 66 into the path of the cam lever 14, the radial face 66 of such tooth being adapted to contact the radial face 66 of the cam lever 14. The opposite face 66 of tooth 64 is bevelled to cooperate with bevelled as face 62 of the cam lever 14. Click 6| .is provided with a weighted end 61, extending from the pivot 66 toward the pivot 66 of the trip lever 66, and a pin 66 set in trip lever 66 supports click 6| in position with the tooth 64 in the position shown so in Fig. 5. A guide clip 66 maintains trip lever 66 in proper position.

Interlocking mechanism between the control device and the burner cocks of the stove is pro-- vided as follows: The circumferential recess 66 66 in plunger I6 also provides a downwardly di: rected shoulder I66, adapted to cooperate with a horizontal lock plunger |6|, slidably mounted in a bore I62 in the housing 64. This plunger |6| is provided with a tip I66 for contact with so the shoulder I66 and a pin I64, operating in a slot I66 In the housing 64, keeps said tip I66 in proper position. The plunger |6| ,is continuously urged toward the plunger. I6 by a spring I66, but is provided with a cross slot I61, bevelled as upwardly and toward plunger 16 for the recep-1 tion of a lock wire I66. Lock wire I 66 is slidable in bore I66 parallel to plunger bore 16 in the housing 64, and-operates through a wound wire conduit 6, which carries it to a point adjacent 7 to the burner cock stems III where the lock wire I66 is connected to a slide rod 2.

Each of the burner cock stems III is provided with a pin II6, adapted to cooperate with a corresponding arm 4, attachedto the sliderod 1s II2 Slide rod H2 is mounted to slide in brackets IIS, one of which supports the adjacent end of the "conduit IIO. A tensile spring IIG, having one end attached to one of the arms Ill and the other end attached to a bracket H5, continually urges the arms H4 against the cock stems III, and likewise 'thus urges the lock wire I upward to enter the bevelled cross-slot I01 of the lock plunger IOI. The rearward'face of l01a of such slot I01 serves asa cam, so that upward movement of the wire I08 withdraws the lock plunger IOI from beneath shoulder 100 against the force of spring 106. Operation is as follows: During all'normal operations of the stove, the plunger 15 is depressed and retained in "down" position by the trip lever 85. When it is desired that the control mechanism be used to shutoff the fuel supply at a certain time interval later, the housewife presses the setting knob 31 inward, at the same time rotating it clockwise until the pointer desighates. say "1", which will indicate that the gas will shut off in one hour.

Rotation of the setting'knob through the. jaw clutch 38 rotates the shaft II, winding the main spring 50, and rotating the cam lever 14 in the direction of the arrow II1. Limit pin H8 is provided to stop rotation when the limit of the control period provided by the control device has been reached. During such rotation of the shaft 41, the friction plates 51 slip, so that such motion is not transmitted through the timing gearing. When the radial face 93 of the cam lever 14 strikes the radial face 95 of the click tooth 04, the click 9| pivots as shown in Fig. 6, to permit passage of the cam lever beyond it. After cam lever 14 has passed. the weighted end 91 insures return of the click to its original position against the pin 90.

The pressure upon the setting knob 31 also depresses the pin 69. and through its movement. as previously described, moves arm 12 against the escapement lever 13. displacing the latter. Release of the setting knob permits return of the escapement lever with suillcient force to start regular timing of .the clockwork by the balance wheel and hair spring to gradually release the energy'stored in the main spring 50 by the initial rotation of shaft ll, returning shaft 4i, cam lever 14, and pointer 36' to their original positions. At any time thereafter, the time may be increased or decreased by operation of the setting knob as before.

As the cam lever 14 under the drive by the mainspring is now rotating in the direction of the arrow N9, the bevel face 02 thereof contacts the bevel face 98 of the click to tend to rotate the same about its pivot 90 in a clockwise direction. This, however, is prevented by the pin 90. Therefore. the triplever is rotated sufficiently in a clockwise direction to release the end 00 from the shoulder 04, thus permitting the valve disc to close against the valve seat 00 under the power of the spring 0t, closing of! the fuel supply to the stove. Through'the push wire I8, closing of the valve as described also raises the plunger 15. Lever 1| continues until striking pin I20, as shown in Fig. 8, whenfurther movement is prevented and the timing movement is stopped.

In order to again operate-the stove, the housewife merely again presses the plunger, after which she may turn individual burners on and ofl manually as many times as she may desire, in the same manner as .if there were no automatic control of the stove, until sheag'ain desires to use the control device.

To insure against thoughtless turning on of provided. As long as any of the burners are open the slide rod II2 will be held inthe position, shown in Fig. 15, the wire I00. thus being retracted from the cross-slot I01, and the plunger IOI being under spring pressure against the plunger 15. At the end of the time period, when trip lever 85 releases plunger 15, as described, as

the plunger rises the tip I03 of plunger I0l slips under the shoulder I00, as in Fig. 17, preventing depression of said plunger, and thus preventing reopening of the valve 3|. until plunger IN is withdrawn. Upon closing of all the burners, tensile spring H6 pulls the slide rod II2 .to the left, as shown in Fig. 15, to the position, shown in Fig. 16, pushing the wire I00 through the conduit IIO upward, the tip thereof contacting the face I01a of the cross slot I01, the cam action thereof withdrawing the plunger IOI against the spring I06. After this the plunger 15 may again I be depressed, opening the valve 3|.

An additional safety feature is provided by providing for thermostatic control of the tripping mechanism, whereby if the burner being controlled should blow out or the pilot control thereof go out for any reason, the main control valve 3| would close to prevent the escape of gas.

This control is best shown in Fig. 5. A bimetallic thermostat spring 2 is attached to a support 2I2 and extends into the flame zone of the burner 2I3, which may be either pilot or main burner. The end 2I4 of the spring 2H carries a push wire 2I5 provided with enlargements 2I8 on either side of the spring 2I I. The push wire 2 I5 leads through a wound wire conduit 2 I1, carried by the support 2I2 to a point beneath the end 89 of the trip lever 05. The conduit is affixed to the housing 34 at 2 I0, and a bore 2 I 0 in housing 34 serves as a guide to the push wire 2I5. As long as the thermostatic spring is heated, the push wire 2I5 is held out of contact with trip lever 05, as illustrated.- Should the burner go out, the spring 2 retracts to the position shown in Fig. 22, and during its passage thereto pushes wire 2I5 against trip lever 85, operating it to release the plunger 15 and thus close valve Si in the same manner as previously described. As shown in Fig. 25, push wire 2I5 is so bent at 2I0a as to release itself from lever 05 as the thermostat spring 2 reaches the completely cooled position of Fig. 22.

In Figs. 19, 20, and 21 is shown another form of this invention in which other connections are provided for manual control and interlock. The plunger 220 is shorter than corresponding plunger 15 and does not extend above housing 23 for manual opening of the valve 3i. This valve is opened by the following mechanism:

The plunger 220 is grooved as at I2I for the receptionof the end I22 of lever I22 pivoted to housing 24 at I24. The other end thereof I is flattened and overlies one end I26 of the push wire I21, guided in a bore I20 in housing 84. Push wire I21 is carried in wound wire conduit I204 attached at one end I29 to housing 04, and at the other end I30 to support III attached to the stove A, adjacent the burner control handles C. A conveniently located push button I22 is attached to a stem I03, guided in a. bore I in the support I3I. Th'epushwire I21 isailixedtothe stein I".

' thereof.

To the burner cock stem lIIa is attacheda cam .disc I36. A spring catch I33 is attached to of push wire 13 as described. Should burner cock stem IIIa be rotated to "on" position, as shown in full lines oi Figsu20 and 21, spring catch I 36 will strike disc I35 and prevent the opening of the valve. When the burner is turned oil by rotating stem I I la in the direction shown by the arrow I31, the push button can be depressed to open valve 3i. Thus, as long as a burner controlled by the stem la is open, valve 3| cannot be opened. Stem Illa may comprise a master valve controllingseveral burners or may control but one.

Having thus described these embodiments-of my invention without limitation to the forms described and illustrated, I claim cure by Letters Patent:

1. In a device of the character disclosed, an auxiliary valve a main valve controlling the sup,- ply of fuel to said auxiliary valve, a burner supplied with fuel by said auxiliary valve, means for manually opening said main valve, a timing de,-.-

vice, setting means therefor, a trip device actuated thereby, closing means for said main valve associated with said trip device to be set into operation thereby, interlocking connections between said auxiliary valve and said manual opening means forsaid main valve, whereby operation of said opening means to open said main valve is prevented while said auxiliary valve is open.

2. In a device of the'character disclosed,- a valve controlling the supply of fuel to a heating device, means for opening said valve, a timing device, setting means therefor, said setting means including a manually operated handle, a clutch engageable therewith, means for disengaging said handle therefrom automatically upon removal of operating force from said handle a starting device for said timing device automatically operated upon disengagement of said clutch-to start said timing device in operation, and closing means for said valve adapted to be set in operation by said timing device after a predetermined time interval,

3. A device as described in claim 2 and including: a catch spring associated with said starting device adapted to eil'ect impulsive starting 4. In a valve timing device, a clock mechanism, a member driven thereby, valve closing means, a -trip operable by said member at a certain position thereof to permit operation of said valve closing means, setting means forsaid member, a clutch providing connection there between for setting of said member, and a startand desire to seing device'for said clock mechanism associated 5. A device as described in claim 4 ma including a catch spring associated with said starting device adapted to eflect impulsive starting thereof.

6. A device as described in claim 4 in which setting of said member winds said clock mecha-' nism.

'7. A device as described .in claim 4 and including a friction clutch between said member and said clock mechanism, 'whereby the time interval determined by the setting thereof may be increased or diminished subsequent to the initial setting.

8. A device as described in claim 4 and including a catch spring tensioned upon engagement of said clutch and adapted to restrain operation of said starting device until said clutch has been disengaged.

9. A device as described in claim 4 and including a spring pressed pin associated with said starting device and adapted to be engaged by said setting means upon engagement of said clutch.

10. In a timing device adapted for setting to perform an operation at a. given time and provided with a main shaft having a frictional control from escapement gearing, a setting knob, a clutch connection between the main shaft and said knob, means for automatically disengaging said clutch upon release of pressure from said knob, a starting device cooperative with said escapement gearing to start same in motion, means for tensioning said starting mechanism upon application of pressure to said knob whereby release of said pressure will eil'ect starting of said timing device.

11. A device as in claim 10 and including a at a predetermined time interval, .means for manually opening said main valve, an auxiliary. valve supplied with a flow medium thrusaid main; valve and means associated with said auxiliary valve and said valve opening means to lock said main valve opening means and prevent such man-.

ual opening when said auxiliary valve is open. 13. A device as described in claim 12 and including a plurality of such'auxiliary valves, said locking means being operatively associated with a plurality of said auxiliary valves and with said Opening means whereby manual opening of said main valve is prevented when any of said auxiliary valves is open.

, FRED HAUSER. 

